28445384 has 16 divisors (see below), whose sum is σ = 58183920. Its totient is φ = 12929680.

The previous prime is 28445371. The next prime is 28445401. The reversal of 28445384 is 48354482.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161534 + ... + 161709.

It is an arithmetic number, because the mean of its divisors is an integer number (3636495).

Almost surely, 2^28445384 is an apocalyptic number.

It is an amenable number.

28445384 is an abundant number, since it is smaller than the sum of its proper divisors (29738536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28445384 is a wasteful number, since it uses less digits than its factorization.

28445384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323260 (or 323256 counting only the distinct ones).

The product of its digits is 122880, while the sum is 38.

The square root of 28445384 is about 5333.4214159393. The cubic root of 28445384 is about 305.2604923188.

It can be divided in two parts, 2844 and 5384, that added together give a palindrome (8228).

The spelling of 28445384 in words is "twenty-eight million, four hundred forty-five thousand, three hundred eighty-four".